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用十六烷基三甲基溴化铵和苄基三甲基氯化铵改性膨润土制备了多孔碳柱撑膨润土。用Fourier变换红外光谱仪、扫描电子显微镜和氮气吸附–脱附、热分析系统地研究了有机改性剂对多孔材料性能的影响。结果表明:膨润土微粒与有机改性剂以共价键和离子嵌入2种形式结合;多孔碳柱撑膨润土的微观形貌呈针片状,最可几孔径分布大约在1.7nm;多孔材料的主要结构是由碳化的大粒子柱撑而构建的二维孔径,烧结后的有机黏土热稳定性大大提高。
Porous carbon pillared bentonites were prepared by using bentonite modified with cetyltrimethylammonium bromide and benzyltrimethylammonium chloride. Fourier transform infrared spectroscopy, scanning electron microscopy and nitrogen adsorption - desorption, thermal analysis systematically studied the impact of organic modifiers on the properties of porous materials. The results show that bentonite particles and organic modifier are covalently bonded with two kinds of ions. The microstructure of porous carbon pillared bentonite is needle-like, and the most probable pore size distribution is about 1.7 nm. The main porous materials The structure is a two-dimensional pore structure constructed by carbonized large-particle pillars. The thermal stability of the sintered organic clay is greatly enhanced.